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Flat 5K runs in September 2026

Find flat 5k runs near me in September 2026 - filter by date, location or category, display on a map or use the advanced search to find your perfect race.

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More than just a running race. Join thousands at Bedfordshire’s most popular weekend of running with festival magic, live music, bar, yoga, kids zone, street food, outdoor cinema and fun fair!
  • Sat 5 Sep 2026
  • £18-£20
Bedford, Bedfordshire, UK

Bedford 5K

More than just a running race. Join thousands at Bedfordshire’s most popular weekend of running with festival magic, live music, bar, yoga, kids zone, street food, outdoor cinema and fun fair!

  • Chip timing
  • Enter online
  • Flat
  • Traffic free
  • Age 11 & over
  • 5 km road running + 33 ft ascent
Set along the beachfront promenade at Southbourne (SoBo), choose your own distance from 5K to ultra, along this flat, tarmacked, lapped route suitable for all abilities.
  • Sun 27 Sep 2026
  • £37.50-£39.50
Bournemouth, Dorset, UK

SoBo Series | Volume 4 | Stop me (if you think you've heard this one before)

Set along the beachfront promenade at Southbourne (SoBo), choose your own distance from 5K to ultra, along this flat, tarmacked, lapped route suitable for all abilities.

  • Beginner-friendly
  • Enter online
  • Flat
  • Traffic free
  • Event village
  • Coast
  • Public transport links
  • Age 18 & over
  • 7 hrs road running + 0 ft ascent
This welcoming 5K for runners of all abilities follows a flat route by the scenic River Ness, as part of the awe-inspiring Loch Ness Marathon festival weekend.
  • Sun 27 Sep 2026
  • £18
Inverness, Highland, UK

River Ness 5K

This welcoming 5K for runners of all abilities follows a flat route by the scenic River Ness, as part of the awe-inspiring Loch Ness Marathon festival weekend.

  • Enter online
  • Flat
  • Traffic free
  • Age 1 & over
  • 5 km road running
  • Sun 13 Sep 2026
Langport, Somerset, UK

Naked | Clothes-free run | Naked 5K

  • 5 km multi terrain running
  • Sun 13 Sep 2026
Brockenhurst, Hampshire, UK

The Garmin New Forest Marathon | 5K

  • 5 km multi terrain running + 50 ft ascent

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